| Компонент | Описание | Производитель | |
| DS1643P-70 | Nonvolatile Timekeeping RAMs |
Maxim Integrated Products |
|
| DS1643P-70 | Nonvolatile Timekeeping RAM |
Dallas Semiconductor |
|
| DS1643P-70+ | Nonvolatile Timekeeping RAMs |
Maxim Integrated Products |